A024590 - OEIS

A024590

a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (composite numbers), t = (odd natural numbers).

4, 12, 38, 58, 118, 154, 253, 307, 451, 525, 731, 829, 1109, 1235, 1586, 1742, 2170, 2358, 2888, 3112, 3756, 4020, 4767, 5073, 5929, 6279, 7277, 7675, 8798, 9246, 10500, 11000, 12391, 12945, 14479, 15089, 16809, 17479, 19397, 20131, 22218, 23018, 25280